Thanks gents, truly great recommendations and links! I fell in love with Holland & Holland's linen safari jacket. Their jackets seem to be of the same quality as Beretta Gallery's safari-wear, but more stylized. The only problem I see is that their prices seem pretty steep for RTW. Purdey has a great selection of upland gear and clothing.
I see where
http://www.mcconnellhalloutfitters.com/ lists Leonard Logsdail as a contributing "manufacturer" but I don't see anything of his on sale or in the catalog. He seems to have a great following in the US for specialty wear such as safari and smoking jackets. I'm going to search some more to see if I can find some examples of his work.
Cufflink, it is funny that you mentioned Gunga Din, because it recently worked its way up my Netflix queue and I ended up watching it about a week ago. It is definitely a classic, and I love how they speed up all of the action and fight sequences to make them seem more intense than they really are. Other movies notable for their safari gear include Out of Africa and Four Feathers. What is the name of the area in London where all of the boutique rifle and outdoor gear makers are located?